Pro-Perfume Compound Separation for Controlled Fragrance Release
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Solution Overview
Problem
Pro-perfume compounds in consumer products often face stability issues and premature fragrance release due to their labile nature when in contact with triggers, leading to an unsatisfactory longevity and control of the perfuming effect, especially in applications like laundry detergents.
Innovation Solution
A perfumed consumer product design where the pro-perfume compound and trigger are physically separated, either within the same particle, different particles, or in different compartments, to control the release of the fragrance, using various functional groups such as Michael-type additions, enzyme-cleavable esters, and photo-labile compounds, and employing microencapsulation techniques like core-shell microcapsules and granules to maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pro-perfume compound and trigger are mixed together in the same product formulation, then the fragrance release function is ready to work, but the pro-perfume compound undergoes premature reaction and loses stability
Solution Approach 1:
The product formulation is segmented into distinct compartments or particles: one containing the pro-perfume compound and another containing the trigger. This physical separation prevents premature contact and reaction between the two components, maintaining the stability of the pro-perfume compound during storage while ensuring both components are present and functional when needed for controlled fragrance release.
2Duration of action of stationary object
If pro-perfume compound is kept stable during storage, then longevity is improved, but controlled release upon trigger contact is compromised due to premature reaction
Solution Approach 1:
By segmenting the formulation into separate compartments or particles for the pro-perfume compound and trigger, the system maintains stability during storage (improving longevity) while preserving the ability to achieve controlled release kinetics when the components are brought into contact under controlled conditions during application.
Solution Approach 2:
The pro-perfume compound is prepared and stabilized in advance in a separate compartment or particle, ready for controlled release. This preliminary stabilization ensures the compound remains intact during storage, and the controlled release kinetics are achieved when the trigger is subsequently introduced during the application process.
3Productivity
If pro-perfume compound and trigger are in contact, then fragrance release occurs, but the release is premature and uncontrolled
Solution Approach 1:
The formulation is divided into separate compartments or particles, with the pro-perfume compound in one and the trigger in another. This segmentation prevents premature contact and ensures that fragrance release occurs only at the appropriate time when the components are intentionally brought into contact, eliminating timing losses.
Solution Approach 2:
The system employs preliminary protective measures by physically separating the pro-perfume compound and trigger, preventing premature reaction. This anti-action (separation) is maintained during storage and only reversed at the appropriate time during application, ensuring controlled timing of fragrance release.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This separation method enhances the compatibility and stability of pro-perfume compounds with their triggers, ensuring a long-lasting and controlled fragrance release, improving the perfuming experience by maintaining the fragrance intensity and stability over time.
Implementation Method 1
obtained by a Michael-type addition and releasing an odoriferous α,β-unsaturated ketone, aldehyde or carboxylic ester
Implementation Method 2
comprising an imine functional group and being a moisture-labile compound
Implementation Method 3
comprising a cinnamyl ether functional group and being an oxygen-labile compound
Implementation Method 4
comprising enol-ether functional group and being an oxygen-labile compound
Implementation Method 5
comprising an alpha-ketoester functional group and being a photo-labile compound
Implementation Method 6
comprising one or two ester functional groups and being an enzymatic-labile compound
Data Source
AI summary
Described herein is a perfumed consumer product including a pro-perfume compound and a trigger, where the pro-perfume compound and the trigger are physically separated from each other by including the pro-perfume compound or the trigger in a particle, the pro-perfume compound and the trigger in different particles or the pro-perfume compound and the trigger in different compartments. Also described herein are methods of using said perfumed consumer product to confer, enhance, improve or modify a perfuming effect of an article.